Now run the same exercise for the principal paydown and factor in some cash flow / tax benefits on the side.You cannot get returns anywhere near this in the stock market or any other alternative with such certainty and low volatility.

Either way seems to me there are plenty of other investment opportunities that won't be as volatile. 

And tenants in this price range are so much more volatile than say, $1,000 a month tenants.  

I would say if you do end up deciding to buy, buy assets (and in markets) that aren't so volatile. 

Capital appreciation in good markets far outstrips any income gains one can make but it is volatile.

There is huge volatility in the quality level of bookkeepers.

It’s a volatile situation every time you rent to someone.

The Phoenix market was too volatile and risky for me to feel comfortable around this time and there were no real duplexes there, so I convinced my husband to move to Rochester, NY where multi-families are everywhere and we could live super cheap.

So I read the the very well written copy full of pressure on the pain points of being a dentist, investing in the volatile stock market, multiple testimonials, and a compelling call to action from a client rather than Phelps!!!!

Remember, this is a local real estate play and spreading your investments across a few areas to build multifamily will grant you better protection from market volatility.